Mitsubishi A1SD75M3 User Manual page 477

12 CONTROL AUXILIARY FUNCTIONS
1) When the direction from the workpiece to the zero point is the same as the " Pr.46 Zero point
return direction", a normal machine zero point return is carried out.
2) When the direction from the workpiece to the zero point is the opposite direction from the
" Pr.46 Zero point return direction", the operation carries out a deceleration stop when the near-
point dog turns OFF, and then carries out a machine zero point return in the direction set in
" Pr.46 Zero point return direction".
Lower limit
(b) Zero point return retry operation when the workpiece is outside the range
between the upper and lower limits.
Machine zero point return start
Pr.46 Zero point return direction
Lower limit
Pr.46 Zero point return direction
Near-point dog
Fig. 12.2 Zero point return retry operation from on limit (limit signal OFF)
Near-point dog
Zero point
Movement range
Zero point
Movement range
12 - 5
MELSEC-A
Zero point
Upper limit
Machine zero point return start
Zero point
Upper limit